Tungsten Trioxide Damping Function on OLED

The organic light-emitting diode is known as laser electroluminescent display (Organic Light-Emitting Diode, OLED). The feature of OLED display technology is self-luminous, it is made by very thin coating of organic materials and glass substrates composed of organic material which emits light when current passes through. OLED display screen viewing angle is large, with power-saving features.

DC Magnetron Sputtering Method:
When the voltage reaches 20V, the brightness of IWO-OLED (referred IWO) is 8791cd / m2, the brightness of IWO / WO₃-OLED (referred IWO / WO₃) is 16690cd / m2; when the voltage decreases to 19V, the maximum power efficiency IWO / WO₃ devices is 1.581m / W. In contrast, for IWO device, when the current density increases, the luminous efficiency gradually increases, when the current density reaches 181.9mA / cm2, the luminous efficiency reaches a maximum of 4.83cd / A. For IWO / WO₃ devices, when the voltage is 19V, luminous efficiency reaches the maximum 9.56cd / A, which is twice than that of the former. In short, in terms of the brightness of IWO / WO₃-OLED, luminous efficiency and power efficiency has improved significantly.

Pulsed Plasma Deposition, PPD Method:
When the voltage reaches 20V, the brightness of IWO is 8791cd / m2, the brightness of IWO / WO₃ is 17360cd / m2, its brightness is more than twice as light as the non-tungsten trioxide buffer layer devices, which shows adding to the buffer layer of tungsten trioxide indeed improving the OLED device emits light brightness. However, for the purposes of power efficiency IWO / WO₃ device, it did not effectively improve because of the insertion of the tungsten trioxide. Luminous efficiency, IWO / WO₃-OLED device was not as good IWO-OLED. Analysis shows, the performance of OLED device and the buffer layer are closely linked.

We analyze XRD and AFM characterization of the lattice structure of tungsten trioxide film, which can find prepared amorphous structure having a relatively flat surface. The use of tungsten trioxide films that prepared by two methods as OLED anode electrode, which has cushion work function.

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